25NL 99 against a re-raise

[DLKeeper1]

I had just sat down and I don't have PT so no reads. Is this a weak fold? How do you interpret a limp UTG followed by a re-raise against an unknown?

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $0.10/$0.25
6 players
Converter

Pre-flop: (6 players) Hero is BB with 9[img]/images/graemlins/club.gif[/img] 9[img]/images/graemlins/spade.gif[/img]
UTG calls, 2 folds, Button calls, SB folds, SB folds, <font color="#cc0000">Hero raises to $1.5</font>, <font color="#cc0000">UTG raises to $4.5</font>, Button folds, Hero folds.
Uncalled bets: $3 returned to UTG.

Results: